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Finding the Fourth Proportional to 21,412.64, 32,110.98 and 7,368.74

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Solution

The fourth proportional to 21,412.64, 32,110.98 and 7,368.74 is: 11,050.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.64 : 32,110.98 = 7,368.74 : x
  2. Step 2: Convert to fraction form
    21,412.64/32,110.98 = 7,368.74/x
  3. Step 3: Cross multiply
    21,412.64x = 32,110.98 × 7,368.74
  4. Step 4: Simplify right side
    21,412.64x = 236,617,462.77
  5. Step 5: Solve for x
    x = 236,617,462.77/21,412.64
  6. Step 6: Final answer
    x = 11,050.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.